An arrangement of Trinacria regina from Fur Island, Jutland, Denmark (Fuur is apparently an older spelling). Fossil marine deposit, late Paleocene and early Eocene epochs, roughly 54 to 55 million years ago. No makers name. Olympus BHB microscope using 450nm LED light. As well as the arrangement I imaged one using the 63x Leitz Pl Apo NA 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 58 images Pmax.
Trinacria regina Heiberg 1863. Published in: Heiberg, P.A.C. (1863). Conspectus criticus diatomacearum danicarum. Kritisk oversigt over de danske Diatomeer. pp. 1-135, 6 pls. Kjøbenhavn: Wilhelm Priors Forlag. Page 50, Plate 3, Figure 7.